No More Water Wastage! Easy Fix for Tank Leaks

A leaking concrete water tank is a major issue. It wastes water, weakens the structure, and can lead to contamination. But draining the entire tank for repairs? Not always practical. Emptying a tank means water shortages, disruption, and extra costs.

The good news? You don’t always need to drain the tank to fix leaks. Repairs can be done from the outside and inside using effective water leakage solutions that stop water seepage and strengthen the tank. Want to know how? Keep reading to explore the best repair methods and waterproofing products!

How to Repair Cement Water Tank Leakage Without Draining (From the Outside and Inside)

1. Identify the Leakage Point

Before repairing the leak, locate the exact spot:

• Look for wet patches or damp areas on the tank surface.
• Check for visible cracks inside or outside.
• Tap different sections: hollow sounds may signal weak spots.
• Observe water flow for slow seepage areas.

Tip: Can’t spot the leak? Place a dry cloth on the suspected area and check for dampness later.

2. Use Underwater Epoxy Sealant (For Internal Repairs)

Underwater epoxy is a reliable solution for fixing cement water tank leaks without draining the tank. It bonds underwater, sealing cracks instantly. This epoxy has hydrophobic properties, meaning it repels water while curing, forming a strong, waterproof seal. You don’t need to worry about the epoxy dissolving in water. 

How to Apply Epoxy for Water Tank Leaks:

• Clean the leak area with a wire brush.
• Mix the epoxy as per the instructions.
• Apply directly onto the wet surface.
• Allow it to cure fully.

3. Apply Hydraulic Cement (For External Sealing)

Hydraulic cement expands as it sets, making it a great solution for roof waterproofing and water tank sealing.

Steps to Fix the Leak with Hydraulic Cement:

• Clear loose debris and widen the crack slightly.
• Mix hydraulic cement with water into a thick paste.
• Apply the paste onto the crack, pressing firmly.
• Hold for a few minutes until it sets.

4. Use Polyurethane Grouting (For External Repairs)

Polyurethane grout is an expanding sealant that fills cracks and stops water seepage instantly.

How to Apply Polyurethane Grout:

• Drill small holes along the crack.
• Inject the polyurethane grout using a grouting gun.
• Let it expand and fill the gaps.
• Allow it to cure for a long-lasting roof leakage solution.

How to Prevent Water Tank Leakage in the Future

Fixing leaks is just part of the solution. To stop future leaks, follow these preventive steps:

1. Apply a Waterproof Coating for Long-Term Protection

Applying a waterproofing coat inside the tank is one of the best ways to permanently prevent water seepage. This method requires draining the tank but provides a long-lasting roof waterproofing solution.

Best Waterproof Chemicals for Roofs & Water Tanks:

• POLYALK WP – A cementitious waterproofing solution that strengthens the tank.
• SUNKOTE WP+ – An acrylic waterproof coating that prevents seepage.
• SUNPUGARD – A polyurethane waterproof coating suitable for roofs and water tanks.

Steps to Apply a Waterproof Coating:

• Drain the tank completely.
• Clean and roughen the surface using sandpaper.
• Apply the first coat and let it dry.
• Apply additional layers for stronger protection.
• Let the coating cure before refilling the tank.

2. Regular Inspections

• Check for small cracks before they worsen.
• Monitor leakage-prone areas like joints and edges.
• Look for damp patches on external surfaces.

3. Keep the Tank Clean

• Remove algae and debris that weaken the surface over time.
• Scrub and clean the tank every few months to prevent buildup.

Why Choose Sunanda Global for Water Tank Waterproofing?

As the best waterproofing company, Sunanda Global provides high-quality waterproofing solutions for homes, commercial buildings, and industries. Our expertise in roof waterproofing services ensures long-term protection against water seepage and leakage.

If you’re dealing with water tank leakage, don’t wait for the damage to worsen. Contact Sunanda Global today for trusted top-grade products or waterproofing contractors in Mumbai and other major Indian cities.